ceaseless

形容词 ceaseless:

1. uninterrupted in time and indefinitely long continuing
   同义词：constant, incessant, never-ending, perpetual, unceasing, unremitting

1. His ceaseless chatter began to annoy me.
   他不停的唠叨使我厌烦起来。
2. Spray slaps the coast ceaselessly.
   海浪不停地拍打着海岸。
3. The girl's ceaseless cry makes us feel pity for her.
   这个小女孩不停的哭声使我们对她感到同情。

cease.less

adj.（形容词）
Without stop or pause; constant.See Synonyms at continual
不停的：未停止或中断的；持续的参见 continual

【引伸】
cease.lessly
adv.（副词）
cease.lessness
n.（名词）